Barking drum



Nov. 22, 1966 H. A. DELCJELLIER BARKING DRUM 4 Sheets-$heet 1 Filed July 2, 1964 M1 1 I o W lll lll lllllllllllllll II II II IHHIIIIIIIIIIHHH ATTORNEY Nov. 22, 1966 A. DELCELLIER 3,286,747

BARKING DRUM Filed July 2, 1964 4 Sheets-Sheet 2 FIG. 3A F/G. 35

INVENTOR.

HENRI A. DELCELL/ER Nov. 22, 1966 H. A. DELCELLIER 3,

BARKING DRUM Filed July 2, 1964 4 Sheets-Sheet 5 Nov. 22, 1966 A. DELCELLIER BARKING DRUM 4 Sheets-Sheet 4.

Filed July 2, 1964 INVENTOR HENR/ A. DELCELL/ER ATTORNEY United States Patent 3,286,747 BARKING DRUM Henri A. Delcellier, Beaurepaire, Quebec, Canada, as-

signor toCanadian Ingersoll-Rand Co., Ltd., Montreal, Quebec, Canada, a corporation of Canada Filed July 2, 1964, Ser. No. 379,837 6 Claims. (Cl. 144-208) This invention relates to paper and pulp machinery and more particularly to an improved barking drum for removing bark from cut logs. 4

Heretofore, conventional barking drums have comprised rotatable cylindrical drums provided with spaced barking staves on their inner peripheries for tumbling and debarking the cut logs. These conventional barking drums: (l) are excessive in weight with attendant high power consumption during operation; (2) are diflicult and expensive to erect; (3) lack torsional rigidity with resultant weld failure between the barking staves and the drums. I

It is the general object of the present invention to avoid and overcome the foregoing and other difiiculties of and objections to prior art practices by the provision of an improved barking drum which: 1) is substantially lighter in weight than conventonal drums with resultant lower power consumption during operation; (2) is simple and easy to erect; (3) has torsional rigidity with reduced weld failure during operation; (4) has reduced maintenance.

The aforesaid objects of the present invention, and other objects which will become apparent as the description proceeds, are achieved by providing an improved barking drum for removing the bark from cut logs. The improved barking drum comprises a'drum body including a plurality of opposing plate sections cooperating to form the outer walls of the drum body and defining a cavity for receiving the cut logs. The plate sections are deformed, preferably by press, to include a plurality of integral, inwardly extending protrusions projecting into the cavity for agitating cut logs therein. The plate sections are joined by connecting means to be retained in said cooperating relationship wherein they define the cavity.

For a better understanding of the present invention, reference should be bad to the accompanying drawings, wherein like numerals of reference indicate similar parts throughout the several views and wherein:

FIG. 1 is an end elevational view of the improved barking drum of the present invention;

FIG. 2 is a side elevational view along the line 2-2 of FIG. 1 in the direction of the arrows;

FIGS. 3A, 3B are fragmentary end elevational views of alternative log debarking surfaces;

FIG. 4A is a fragmentary plan view of a dimpled log debarking surface;

FIG. 4B is a vertical sectional view along the line 4B--4B of FIG. 4A, in the direction of the arrows;

FIG. 5 is a vertical elevational view of a straight sided casing section for a polygonal barking drum;

FIG. 6 is a perspective view of a barking drum provided with helical tension members; and

FIG. 7 is a fragmentary perspective view showing an alternative filler means for resisting cyclic shear stresses.

Although the principles of the present invention are broadly applicable to pulp and paper machinery, the present invention is particularly adapted for use in conjunction with a barking drum and hence it has been so illustrated and will be so described.

With specific reference to the form of the present invention illustrated in the drawings, and referring particularly to FIGS. 1 and 2, an improved barking drum of the present invention is indicated generally by the reference numeral 10.

3,286,747 Patented Nov. 22, 1966 The improved barking drum 10 comprises a casing or drum body 12 made up of a plurality of, for example in the showing of FIGS. 1 and 2, three opposing, casing or plate sections 14a, 14b, 140. Each of these metallic (i.e., steel or iron) casing sections 14a, 14b, 14c is formed in a press (not shown) from a Hat plate which is deformed to provide an integral, generally corrugated log debarking surface on its periphery. In addition, each casing plate 14a, 14b, 140 is provided with bark discharge means, such as the apertures 18 in lands 19, which apertures 18 are disposed at an angle 0 with respect to the longitudinal axis of the casing 12 to prevent localized stresses in the casing 12 and provide torsional rigidity to the casing 12. The desired optimum value of the angle 19 is about 45 in clockwise direction to the left and counter-clockwise to the right of girth gear 20, all as viewed in FIG. 2.

In order to assemble the barking drum 10, the girth gear 20 and tires or circumferential rim members 22a, 22b are positioned and the casing sections 14a, 14b, 140 are secured thereto by bolts 24. Thereafter, the casing sections 14a, 14b, 140 are welded together along longitudinal seams 26a, 26b, 26c.

ALTERNATIVE EMBODIMENTS It will be understood by those skilled in the art that alternatively, as shown in FIG. 3A, the casing section 14c(3A) may be provided with the saw tooth type log debarking surface 16(3A). In FIG. 3B, the casing section 14c(3B) may be provided with asymmetrical rounded log debarking surfaces 16( 3B).

In FIG. 4A, the casing section 140(4A) is provided with a dimpled log debarking surface 16 (4A) disposed in staggered spaced relationship.

In FIG. 5 a casing section 1411(5), a straight sided section provided with the log debarking surface 16(5), similar to log debarking surface 16 is shown as a section. It will be understood that any number, as desired, of the sections 14a(5) may be used. It will be noted that the casing section 1411(5) as well as the preferred and alternative embodiments of the casing sections may be made of reinforced resin polymer, such as polyester fiber glass, epoxy fiber glass, or polyurethane fiber glass by hand lay-up method or the methods and apparatus shown in U. S. Patent No. 2,933,125, issued Apr. 19, 1960 to D. Anderson and No. 2,787,314, issued Apr. 2, 1957 to D. Anderson.

In FIG. 6, the barking drum 10(6) of the present invention or a conventional drum (not shown) is provided with tension members 30 formed as helices on the periphery of the casing 12(6) pre-stressed by positioning means, such as turnbuckles 32 and disposed at any angle 0 with respect to the shear planes of the drum, 0 being optimumly about 45 clockwise to the left of girth gear 20(6) and counter-clockwise to the right of girth gear 20(6), all as viewed in FIG. 6.

Referring to FIG. 7, the lands 19(7) between debarking surfaces 16(7) are filled with filler means, such as filler members 34, disposed in spaces 36 along an angle of 0(7) with respect to the shear planes of the drum, 0(7) being optimumly about 45.

It will be recognized by those skilled in the art that the objects of the present invention have been achieved by providing an improved barking drum which is (1) substantially lighter in weight than conventional barking drums; (2) simple and easy to erect; (3) torsionally rigid with reduced weld failure in operation; (4) easier to maintain.

While in accordance with the patent statutes preferred and alternative embodiments of the present invention have been illustrated and described in detail, it is to be particularly understood that the invention is not limited thereto or thereby.

I claim: 1. In a barking drum for removing bark from cut logs,

a drum body comprising:

a plurality of opposing plate sections cooperating to form the outer walls of said drum body and to define a cavity for receiving said out logs;

the opposite sides of each of said plate sections each extending adjacent a side of another of said plate sections and being secured to said adjacent side of said another of said plate sections;

said plate sections being deformed to include a plurality of integral, inwardly extending protrusions projecting into said cavity for agitating cut logs therein; and

means connecting said plate sections to retain the latter in said cooperating relationship wherein they define said cavity;

said connecting means comprising a plurality of spaced, rim members extending peripherally around said cavity and joining said plate sections into a unitary construction.

2. In a barking drum for removing bark from cut logs,

a drum body comprising:

a plurality of opposing plastic plate sections cooperating to form the outer walls of said drum body and to define a cavity for receiving said cut lo-gs;

said plate sections being deformed to include a plurality of integral, inwardly extending protrusions projecting into said cavity for agitating cut logs therein; and

means connecting said plate sections to retain the latter in said cooperating relationship wherein they define said cavity;

said connecting means comprising a plurality of spaced, rim members extending peripherally around said cavity and joining said plate sections into a unitary construction.

3. In a barking drum for removing bark from out logs,

drum body comprising:

a plurality of opposing plate sections cooperating to form the outer walls of said drum body and to define a cavity for receiving said out logs;

said plate sections being deformed to include a plurality of integral, inwardly extending, asymmetrically rounded protrusions projecting into said cavity for agitating cut logs therein; and

means connecting said plate sections to retain the latter in said cooperating relationship wherein they define said cavity;

said connecting means comprising a plurality of spaced, rim members extending peripherally around said cavity and joining said plate sections into a unitary construction.

4. In a barking drum for removing bark from cut logs,

a drum body comprising:

that said cavity is formed of polygonal cross section;

said plate sections being deformed to include a plurality of integral, inwardly extending protrusions projecting into said cavity for agitating cut logs therein; and

means connecting said plate sections to retain the latter in said cooperating relationship wherein they define said cavity;

said connecting means comprising a plurality of spaced, rim members extending peripherally around said cavity and joining said plate sections into a unitary construction.

5. In a barking drum for removing bark from out logs,

drum body comprising:

a plurality of opposing plate sections cooperating to form the outer walls of said drum body and to define a cavity for receiving said out logs;

said plate sections being deformed to include a plurality of integral, inwardly extending protrusions projecting into said cavity for agitating cut logs theresaid protrusions cooperating to provide a dimpled debarking surface on the internal circumference of said plate sections; and

means connecting said plate sections to retain the latter in said cooperating relationship wherein they define said cavity;-

said connecting means comprising a plurality of spaced, rim members extending peripherally around said cavity and joining said plate sections into a unitary construction.

6. In a barking drum for removing bark from cut logs,

drum body comprising:

a plurality of opposing plate section cooperating to form the outer walls of said drum body and to define a cavity for receiving said cut logs;

said plate sections being deformed to include a plurality of integral, inwardly extending protrusions projecting into said cavity for agitating cut logs therein;

tension means disposed on said plate sections at an angle relative to the shear planes of said drum; and

means connecting said plate sections to retain the latter in said cooperating relationship wherein they define said cavity;

said connecting means comprising a plurality of spaced, rim members extending peripherally around said cavity and joining said plate sections into a unitary construction.

References Cited by the Examiner UNITED STATES PATENTS 1,311,226 7/ 1919 Guettler. 1,457,487 6/ 1923 Bartley. 2,712,330 7/1955 Thompson. 2,943,656 7/1960 Wakeman.

FOREIGN PATENTS 1,226,679 7/ 1960 France.

WILLIAM D. DYER, JR., Primary Examiner.

W. D. BRAY, Assistant Examiner. 

1. IN A BARKING DRUM FOR REMOVING BARK FROM CUT LOGS, A DRUM BODY COMPRISING: A PLURALITY OF OPPOSING PLATE SECTIONS COOPERATING TO FORM THE OUTER WALLS OF SAID DRUM BODY AND TO DEFINE A CAVITY FOR RECEIVING SAID CUT LOGS; THE OPPOSITE SIDES OF EACH OF SAID PLATE SECTIONS EACH EXTENDING ADJACENT A SIDE OF ANOTHER OF SAID PLATE SECTIONS AND BEING SECURED TO SAID ADJACENT SIDE OF SAID ANOTHER OF SAID PLATE SECTIONS; SAID PLATE SECTIONS BEING DEFORMED TO INCLUDE A PLURALITY OF INTEGRAL, INWARDLY EXTENDING PROTRUSIONS PROJECTING INTO SAID CAVITY FOR AGITATING CUT LOGS THEREIN; AND MEANS CONNECTING SAID PLASTIC SECTIONS TO RETAIN THE LATTER IN SAID COOPERATING RELATIONSHIP WHEREIN THEY DEFINE SAID CAVITY; SAID CONNECTING MEANS COMPRISING A PLURALITY OF SPACED, RIM MEMBERS EXTENDING PERIPHERALLY AROUND SAID CAVITY AND JOINING SAID PLATE SECTIONS INTO A UNITARY CONSTRUCTION. 